package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.config.OssConfiguration;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * TODO
 *
 * @author wxc
 * @date 2023/8/16 20:16
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

  @Autowired private OrderMapper orderMapper;
  @Autowired private OrderDetailMapper orderDetailMapper;
  @Autowired private ShoppingCartMapper shoppingCartMapper;
  @Autowired private AddressBookMapper addressBookMapper;
  @Autowired private WeChatPayUtil weChatPayUtil;
  @Autowired private UserMapper userMapper;
  @Autowired
  private WebSocketServer webSocketServer;
  /**
   * 用户下单
   *
   * @param ordersSubmitDTO
   * @return
   */
  @Transactional
  public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
    // 异常情况的处理（收货地址为空、超出配送范围、购物车为空）
    AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
    if (addressBook == null) {
      throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
    }
    Long userId = BaseContext.getCurrentId();
    ShoppingCart shoppingCart = new ShoppingCart();
    shoppingCart.setUserId(userId);
    // 查询当前用户的购物车数据
    List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
    if (shoppingCartList == null || shoppingCartList.size() == 0) {
      throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
    }

    // 构造订单数据
    Orders order = new Orders();
    BeanUtils.copyProperties(ordersSubmitDTO, order);
    order.setPhone(addressBook.getPhone());
    order.setAddress(addressBook.getDetail());
    order.setConsignee(addressBook.getConsignee());
    order.setNumber(String.valueOf(System.currentTimeMillis()));
    order.setUserId(userId);
    order.setStatus(Orders.PENDING_PAYMENT);
    order.setPayStatus(Orders.UN_PAID);
    order.setOrderTime(LocalDateTime.now());
    // 向订单表插入1条数据
    orderMapper.insert(order);

    // 订单明细数据
    ArrayList<OrderDetail> orderDetailList = new ArrayList<>();
    for (ShoppingCart cart : shoppingCartList) {
      OrderDetail orderDetail = new OrderDetail();
      BeanUtils.copyProperties(cart, orderDetail);
      orderDetail.setOrderId(order.getId());
      orderDetailList.add(orderDetail);
    }

    // 向明细表插入n条数据
    orderDetailMapper.insertBatch(orderDetailList);

    // 清理购物车中的数据
    shoppingCartMapper.deleteByUserId(userId);

    // 封装返回结果

    return OrderSubmitVO.builder()
        .id(order.getId())
        .orderNumber(order.getNumber())
        .orderAmount(order.getAmount())
        .orderTime(order.getOrderTime())
        .build();
  }

  /**
   * 订单支付
   *
   * @param ordersPaymentDTO
   * @return
   */
  public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
    // 当前登录用户id
    Long userId = BaseContext.getCurrentId();
    User user = userMapper.getById(userId);

    // 调用微信支付接口，生成预支付交易单
    JSONObject jsonObject =
        weChatPayUtil.pay(
            ordersPaymentDTO.getOrderNumber(), // 商户订单号
            new BigDecimal(0.01), // 支付金额，单位 元
            "苍穹外卖订单", // 商品描述
            user.getOpenid() // 微信用户的openid
            );

    if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
      throw new OrderBusinessException("该订单已支付");
    }

    OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
    vo.setPackageStr(jsonObject.getString("package"));

    return vo;
  }

  /**
   * 支付成功，修改订单状态
   *
   * @param outTradeNo
   */
  public void paySuccess(String outTradeNo) {

    // 根据订单号查询订单
    Orders ordersDB = orderMapper.getByNumber(outTradeNo);

    // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
    Orders orders =
        Orders.builder()
            .id(ordersDB.getId())
            .status(Orders.TO_BE_CONFIRMED)
            .payStatus(Orders.PAID)
            .checkoutTime(LocalDateTime.now())
            .build();

    orderMapper.update(orders);
    //通过websocket推送消息
    Map map = new HashMap();
    map.put("type",1);
    map.put("orderId",ordersDB.getId());
    map.put("content","订单号，"+outTradeNo);
    String json = JSON.toJSONString(map);

    webSocketServer.sendToAllClient(json);
  }

  /**
   * 历史订单查询
   *
   * @param page
   * @param pageSize
   * @param status
   * @return
   */
  public PageResult pageQuery4User(int page, int pageSize, Integer status) {
    // 设置分页
    PageHelper.startPage(page, pageSize);
    OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
    ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
    ordersPageQueryDTO.setStatus(status);

    // 分页条件查询
    Page<Orders> pageNum = orderMapper.pageQuery(ordersPageQueryDTO);
    List<OrderVO> list = new ArrayList<>();
    // 查询出订单明细，并封装入OrderVO进行响应
    if (pageNum != null && pageNum.getTotal() > 0) {
      for (Orders orders : pageNum) {
        Long orderId = orders.getId();
        // 查询订单明细
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);

        list.add(orderVO);
      }
    }

    return new PageResult(pageNum.getTotal(), list);
  }

  /**
   * 查询订单详情
   *
   * @param id
   * @return
   */
  public OrderVO details(Long id) {
    Orders orders = orderMapper.getById(id);

    List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

    OrderVO orderVO = new OrderVO();
    BeanUtils.copyProperties(orders, orderVO);
    orderVO.setOrderDetailList(orderDetailList);
    return orderVO;
  }

  /**
   * 用户取消订单
   *
   * @param id
   */
  public void userCancelById(Long id) throws Exception {

    // 根据id查询订单
    Orders ordersDB = orderMapper.getById(id);
    // 校验订单是否存在
    if (ordersDB == null) {
      throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
    }
    // 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
    if (ordersDB.getStatus() > 2) {
      throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
    }

    Orders orders = new Orders();
    orders.setId(ordersDB.getId());
    // 订单处于待接单状态下取消，需要进行退款
    if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
      // 调用微信支付退款接口
      weChatPayUtil.refund(
          ordersDB.getNumber(), ordersDB.getNumber(), new BigDecimal(0.01), new BigDecimal(0.01));
      // 支付状态修改为 退款
      orders.setPayStatus(Orders.REFUND);
    }

    // 更新订单状态、取消原因、取消时间
    orders.setStatus(Orders.CANCELLED);
    orders.setCancelReason("用户取消");
    orders.setCancelTime(LocalDateTime.now());
    orderMapper.update(orders);
  }

  /**
   * 再来一单
   *
   * @param id
   */
  public void repetition(Long id) {
    // 查询当前用户id
    Long userId = BaseContext.getCurrentId();

    // 根据订单id查询当前订单详情
    List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
    // 将订单详情对象转换为购物车对象
    List<ShoppingCart> shoppingCartList =orderDetailList.stream().map(x->{
      ShoppingCart shoppingCart = new ShoppingCart();
      // 将原订单详情里面的菜品信息重新复制到购物车对象中
      BeanUtils.copyProperties(x,shoppingCart,"id");
      shoppingCart.setUserId(userId);
      shoppingCart.setCreateTime(LocalDateTime.now());
      return shoppingCart;
    }).collect(Collectors.toList());

    // 将购物车对象批量添加到数据库
    shoppingCartMapper.insertBatch(shoppingCartList);
  }

  /**
   * 订单搜索
   * @param ordersPageQueryDTO
   * @return
   */
  public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
    PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

    Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

    // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
    List<OrderVO> orderVOList = getOrderVOList(page);

    return new PageResult(page.getTotal(), orderVOList);
  }

  /**
   * 各个状态的订单数量统计
   * @return
   */
  public OrderStatisticsVO statistics() {
    // 根据状态，分别查询出待接单、待派送、派送中的订单数量

    Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
    Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
    Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
    // 将查询出的数据封装到orderStatisticsVO中响应
    OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
    orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
    orderStatisticsVO.setConfirmed(confirmed);
    orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

    return orderStatisticsVO;
  }

  /**
   * 接单
   * @param ordersConfirmDTO
   */
  public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
    Orders orders = Orders.builder()
            .id(ordersConfirmDTO.getId())
            .status(Orders.CONFIRMED)
            .build();
    orderMapper.update(orders);

  }

  /**
   * 拒单
   * @param ordersRejectionDTO
   * @throws Exception
   */

  public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
    Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

    //订单状态为2时才可以拒单
    if (ordersDB ==null||!ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
      throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
    }

    //支付状态
    Integer payStatus = ordersDB.getPayStatus();
    //判断用户是否支付
    if (payStatus == Orders.PAID){
      //用户已经支付
      String refund = weChatPayUtil.refund(
              ordersDB.getNumber(),
              ordersDB.getNumber(),
              new BigDecimal(0.01),
              new BigDecimal(0.01)
      );
      log.info("申请退款:{}",refund);
    }
    //更新订单状态
    Orders orders = new Orders();
    //id
    orders.setId(ordersDB.getId());
    orders.setStatus(Orders.CANCELLED);
    //拒单原因
    orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
    //更新时间
    orders.setOrderTime(LocalDateTime.now());

    orderMapper.update(orders);
  }

  /**
   * 请求订单
   * @param ordersCancelDTO
   */

  public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
    Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

    //支付状态
    Integer payStatus = ordersDB.getPayStatus();
    if (payStatus==1){
      //退款
      String refund =weChatPayUtil.refund(
              ordersDB.getNumber(),
              ordersDB.getNumber(),
              new BigDecimal(0.01),
              new BigDecimal(0.01)

      );
      log.info("申请退款:{}",refund);
    }
    //更新订单状态
    Orders orders = new Orders();
    //id
    orders.setId(ordersDB.getId());
    orders.setStatus(Orders.CANCELLED);
    //拒单原因
    orders.setRejectionReason(ordersCancelDTO.getCancelReason());
    //更新时间
    orders.setOrderTime(LocalDateTime.now());

    orderMapper.update(orders);


  }

  /**
   * 派送订单
   * @param id
   */
  public void delivery(Long id) {
    Orders ordersDB = orderMapper.getById(id);

    //校验订单是否存在，3
    if (ordersDB == null|| !ordersDB.getStatus().equals(Orders.CONFIRMED)){
      throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

    }
    Orders orders = new Orders();
    orders.setId(ordersDB.getId());

    //更新订单状态
    orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
    orderMapper.update(orders);
  }

  /**
   * 完成订单
   * @param id
   */
  public void complete(Long id) {
    Orders ordersDB = orderMapper.getById(id);

    //校验订单是否存在，4
    if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
      throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
    }

    Orders orders = new Orders();
    orders.setId(ordersDB.getId());

    //更新订单状态
    orders.setStatus(Orders.COMPLETED);
    orders.setDeliveryTime(LocalDateTime.now());

    orderMapper.update(orders);


  }

  /**
   * 客户催单
   * @param id
   */
  public void reminder(Long id) {
    Orders ordersDB = orderMapper.getById(id);

    //校验订单是否存在
    if (ordersDB == null ){
      throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
    }

    Map map = new HashMap<>();
    //2催单 1 提醒
    map.put("type",2);
    map.put("orderId",id);
    map.put("content","订单号，"+ordersDB.getNumber());
    String json = JSON.toJSONString(map);

    webSocketServer.sendToAllClient(json);
  }

  // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
  private List<OrderVO> getOrderVOList(Page<Orders> page) {
    // 需要返回订单菜品信息，自定义OrderVO响应结果
    List<OrderVO> orderVOList = new ArrayList<>();

    List<Orders> ordersList = page.getResult();
    if (!CollectionUtils.isEmpty(ordersList)) {
      for (Orders orders : ordersList) {
        // 将共同字段复制到OrderVO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        String orderDishes = getOrderDishesStr(orders);

        // 将订单菜品信息封装到orderVO中，并添加到orderVOList
        orderVO.setOrderDishes(orderDishes);
        orderVOList.add(orderVO);
      }
    }
    return orderVOList;
  }
  /**
   * 根据订单id获取菜品信息字符串
   *
   * @param orders
   * @return
   */
  private String getOrderDishesStr(Orders orders) {
    // 查询订单菜品详情信息（订单中的菜品和数量）
    List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

    // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
    List<String> orderDishList = orderDetailList.stream().map(x -> {
      String orderDish = x.getName() + "*" + x.getNumber() + ";";
      return orderDish;
    }).collect(Collectors.toList());

    // 将该订单对应的所有菜品信息拼接在一起
    return String.join("", orderDishList);
  }
}
